63669925 has 24 divisors (see below), whose sum is σ = 88244352. Its totient is φ = 45168000.

The previous prime is 63669917. The next prime is 63669941. The reversal of 63669925 is 52996636.

It is not a de Polignac number, because 63669925 - 2³ = 63669917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8452 + ... + 14098.

It is an arithmetic number, because the mean of its divisors is an integer number (3676848).

Almost surely, 2^63669925 is an apocalyptic number.

It is an amenable number.

63669925 is a deficient number, since it is larger than the sum of its proper divisors (24574427).

63669925 is a wasteful number, since it uses less digits than its factorization.

63669925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5709 (or 5704 counting only the distinct ones).

The product of its digits is 524880, while the sum is 46.

The square root of 63669925 is about 7979.3436446866. The cubic root of 63669925 is about 399.3111581733.

Subtracting from 63669925 its reverse (52996636), we obtain a square (10673289 = 3267²).

The spelling of 63669925 in words is "sixty-three million, six hundred sixty-nine thousand, nine hundred twenty-five".